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WO1998020446A1 - Procede et dispositif d'enregistrement - Google Patents

Procede et dispositif d'enregistrement Download PDF

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Publication number
WO1998020446A1
WO1998020446A1 PCT/SE1997/001827 SE9701827W WO9820446A1 WO 1998020446 A1 WO1998020446 A1 WO 1998020446A1 SE 9701827 W SE9701827 W SE 9701827W WO 9820446 A1 WO9820446 A1 WO 9820446A1
Authority
WO
WIPO (PCT)
Prior art keywords
images
pen
characters
composite image
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SE1997/001827
Other languages
English (en)
Inventor
Christer FÅHRAEUS
Jan Nilsson
Patrik Söderlund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anoto Group AB
Original Assignee
C Technologies AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL97333022A priority Critical patent/PL333022A1/xx
Priority to CA002270477A priority patent/CA2270477C/fr
Priority to EP97911571A priority patent/EP1010131B1/fr
Priority to BR9712470-2A priority patent/BR9712470A/pt
Priority to IL12966397A priority patent/IL129663A0/xx
Priority to DE1997627320 priority patent/DE69727320T2/de
Priority to CZ991519A priority patent/CZ151999A3/cs
Priority to JP52128898A priority patent/JP3641485B2/ja
Application filed by C Technologies AB filed Critical C Technologies AB
Priority to AU48905/97A priority patent/AU719267B2/en
Priority to AT97911571T priority patent/ATE258323T1/de
Publication of WO1998020446A1 publication Critical patent/WO1998020446A1/fr
Priority to BG103367A priority patent/BG63478B1/bg
Priority to US09/301,856 priority patent/US6529645B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/17—Image acquisition using hand-held instruments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/107—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with manual scanning
    • H04N1/1075—Arrangements for facilitating holding of the scanner, e.g. shapes, grips
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/142—Image acquisition using hand-held instruments; Constructional details of the instruments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/107—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with manual scanning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/195—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a two-dimensional array or a combination of two-dimensional arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0414—Scanning an image in a series of overlapping zones

Definitions

  • the present invention relates to a pen for recording a selected sequence of characters according to the preamble of claim 1, as well as a method for effecting such a recording according to the preamble of claim 7.
  • a reader who reads a text often wishes to mark the most important sections of the text in order to be able to easily find them when next reading through the text, thereby avoiding having to read irrelevant parts of the text. It is known to use so-called highlighter pens for this purpose.
  • a reader may also need to put together selected parts of a text into a new document, which can be edit- ed in a word-processing program in a computer.
  • a known method for feeding text into a computer is to use a scanner.
  • a stationary scanner is used to scan whole pages of text, the scanner being passed over the text automatically at a constant speed. This type of scanner is not suitable for scanning selected parts of a text on a page.
  • a portable scanner on the other hand, can be used for this purpose.
  • US 5,301,243 discloses a handheld scanner for reading characters from a character string on a substrate.
  • the scanner which is passed over the characters which are to be read in contact with the substrate, has an optical system which "sees" a small part of the substrate.
  • the optical system comprises a CCD type line sensor, which has a plurality of light-sensitive ele- ments arranged in a row.
  • OCR software OCR Optical Character Recognition
  • OCR OCR Optical Character Recognition
  • a problem associated with the use of portable scan- ners is that the scanner has to know the distance between the scanned "slices" in order to be able to identify the characters correctly. This means that the scanner either has to be passed over the characters at a constant speed, which is very difficult to achieve manually, or else con- tain a very accurate distance meter.
  • the distance meter makes it difficult to record information from a newspaper or the like if the latter is not placed on a hard surface.
  • the distance meter impairs the possibility of seeing the information which is to be recorded, since the wheel has to abut against the surface from which the information is to be recorded and consequently makes the end of the scanner which abuts against the surface bulkier.
  • a further problem connected with known portable scanners is that they must be held orientated substantially in one and the same predetermined direction the whole time. More specifically, the sensor must be orientated perpendicular to the direction in which the pen is being moved, i.e. perpendicular to the character sequence. If a scanner is held in another direction or is rotated around its longitudinal axis while a sequence of characters is being recorded, the scanner may have difficulty identifying the characters recorded, since there is no directional information in the scanned "slices". This is a serious drawback of the prior art since different individuals often hold a scanner in different ways. In particular, there is a difference in the way right-handed and left-handed individuals hold scanners. Furthermore, an individual often changes the position of his hands as the scanner moves along a line. This is a particular problem when one is holding a book or the like in one' s hand and wishes to record text.
  • US 4,949,391 discloses an optical scanner with no distance meter. More specifically, this optical scanner comprises a two-dimensional sensor, which records images with partially overlapping contents of a text over which the scanner is passed.
  • the handheld scanner is really only an "unintelligent" recording unit which records characters without interpreting them. Instead, the OCR processing is carried out in a computer to which the scanner is connected.
  • the scanner correlates with each other images recorded one after another in order to remove columns with redundant information from the images so that they will require less storage space.
  • the scanner can only be moved in a predetermined direction which is defined by a wheel. Summary of the Invention
  • One object of the invention is to obviate, or at least reduce, the problems described above of the prior art for portable scanners, and specifically to provide a method and a pen which can be used for recording a selected sequence of characters without the aid of a distance meter and with no requirement of a constant speed of movement.
  • a further object is to provide such a method and such a pen which can be held rotated in different ways around its longitudinal axis and which specifically allows the pen to be rotated around its lon- gitudinal axis while a selected sequence of characters is being recorded, without the reliability of the identification of recorded characters being reduced in a decisive manner.
  • the pen and the method according to the invention are used for recording a selected sequence of characters by passing the pen over the char- acter sequence.
  • the sequence selected can, for example, consist of one or several words or one or several sentences selected from a longer text.
  • the characters can be letters, numbers and or other written characters or symbols.
  • the characters can be scanned from a paper or another medium, which can be scanned optically.
  • the pen comprises a light-sensitive sensor with a two-dimensional sensor surface.
  • a two- dimensional sensor surface refers to a sensor surface which can record more than one pixel in two directions perpendicular to one another.
  • the sensor is preferably of the CCD type. It can record two-dimensional images in grey scale or in colour.
  • the images consist of a plurality of pixels, each being defined by an intensity value.
  • the height of the images should be such that there is essentially room in the image for the highest character which is to be recorded.
  • the width of the images can be chosen on the basis of the image-recording frequency desired and available sensors.
  • the pen comprises a signal processing unit which should contain at least a central processing unit, a memory, input/output circuits, and program instructions for implementation of the method according to the invention.
  • the signal processing unit preferably comprises a suitably programmed microprocessor.
  • the signal processing unit employs the partially overlapping contents of the images to put the recorded images together into one image. The putting-together is done both vertically and horizontally so that the vertical as well as the horizontal directional information in the images is utilised. As a result, there is no duplication of the contents in the composite image.
  • the signal processing unit When an image has been put together, the signal processing unit identifies the characters in the image and stores them in character-coded format in a memory in the pen.
  • the pen is of the stand-alone type. However, it is suitably connectable to an external computer, so that the information can be transferred to the latter.
  • a composite image preferably has a predetermined maximum length.
  • the putting-together is suitably carried out sequentially as the images are being recorded. Thus, the fact that the putting-together can be performed in real time reduces the memory require- ment for recorded images. The putting-together normally continues until all recorded images have been put together.
  • the putting-together can be carried out after the recording is complete, in which case a predetermined maximum number of images can be recorded, which are subsequently put together into an image.
  • the pen can have an indicating device for indicating that it is ready to resume recording.
  • the user can hold the pen at an optional angle of rotation in relation to the text and can even rotate the pen while recording the images without impairing the character identification, since the overlapping images contain directional information, which indicates their relative position. This considerably improves user- friendliness .
  • the pen has a display, so that the user can read the recorded character sequence without first having to transfer it to an ordinary computer.
  • the degree of overlapping should preferably be greater than 20%, preferably greater than 50%.
  • the characters which are to be recorded are preferably illu- minated by light pulses when the pen is being passed over the character sequence.
  • the illumination can suitably be achieved with the aid of illumination means, e.g. an LED, which is fitted in or to the apparatus.
  • the frequency of the light pulses should be the same as and be synchro- nised with the frequency for recording images, i.e. the frequency for reading the contents of the light-sensitive sensor.
  • a fast mechanical shutter for example, could be used instead of the pulsed illumination.
  • images recorded one after another are preferably examined in pairs with respect to possible overlap positions for determining the overlap position which affords the best correspondence between the contents of each pair. The overlap position determined in this manner is used when putting together the images of the pair.
  • a pixel intensity value is preferably determined for each overlapping pixel. This pixel intensity value is based on the intensity values of the pixel in question in the images of the pair. The pixel intensity values determined in this manner are used in the final composite image.
  • the image is preferably divided into a plurality of sub- images each comprising a character. This division, which thus does not have to be a physical division but rather can be performed in the whole image, constitutes a preparation for the actual character recognition, each character preferably being interpreted separately. Alternative- ly, whole words or parts thereof could be interpreted.
  • the division of the image into sub-images can be effected by the intensity of the pixels being added up row by row and column by column in the composite image in order to obtain a plurality of row sums and a plurality of column sums and by local minima being identified among the row sums and column sums obtained.
  • the identification of the characters in the composite image is advantageously effected with the aid of a neural network.
  • the intensity value of each pixel in a sub-image is determined and is fed as an input signal to the neural network, which is adapted to identify the character in said sub-image with the aid of the input signals.
  • the composite image Prior to the identification of the characters, the composite image can be rotated if necessary so that the characters in the image form a horizontal row. This facilitates the identification.
  • the pen according to the invention can for example be employed to record text while studying, to scan numerical values, to compose new documents on the basis of old documents which exist in paper form only, and for many other applications.
  • Fig. 1 schematically shows an embodiment of a highlighter pen according to the invention
  • Fig. 2 is a block diagram of the electronic circuitry in an embodiment of the highlighter pen according to the invention
  • Fig. 3 is a flowchart and shows an implementation of the method according to the invention
  • Figs 4a-4e illustrate an example of an implementation of the method according to the invention
  • Figs 5a-5c illustrate another example of an imple- mentation of the method according to the invention.
  • Figs 6a-6c illustrate a further example of an implementation of the method according to the invention. Description of a Preferred Embodiment
  • the pen has a casing 1 with approximate- ly the same shape as a conventional highlighter pen.
  • One short end of the casing 1 has a window 2, which is intended to abut against or be held a short distance from a storage medium, usually a sheet of paper, from which characters are to be recorded.
  • the width of the window 2 is chosen on the basis of the desired image-recording frequency, the desired maximum traction speed and available sensors.
  • the height of the window 2 is somewhat greater that the highest character which is to be record- ed.
  • the window 2 forms an acute angle with the longitudinal axis of the pen, so that the user is guided to hold the pen at a predetermined angle to the sheet of paper.
  • the window is somewhat retracted into the casing so that it will not wear against the paper.
  • the casing 1 essentially contains an optical part 3, an electronic part 4 and a power supply 5.
  • the optical part 3 comprises an LED 6, a lens system 7 and a light-sensitive sensor 8 which constitutes an interface to the electronic part 4.
  • the LED 6 has the task of illuminating the part of the storage medium which is currently under the window.
  • a diffuser 9 is mounted in front of the LED 6 to diffuse the light.
  • the task of the lens system 7 is to project an image of the part of the storage medium which is located under the window 2 of the light-sensitive sensor 8 as accurately as possible. If the sensor 8 has a smaller light-sensitive area than the window 2, the lens system 7 must also reduce the image.
  • the skilled person will be able to construct a number of different lens systems to fulfil this purpose.
  • the sensor 8 is mounted at a small angle to the window 2 and on its own printed circuit board 11.
  • the power supply to the pen is obtained from a battery 12 which is mounted in a separate compartment 13 in the casing.
  • the block diagram in Fig. 2 schematically shows the electronic part 4. It comprises a processor 20, which by the intermediary of a bus 21 is connected to a ROM 22, in which the programs of the processor are stored, to a read/write memory 23, which constitutes the working memory of the processor and in which the images from the sensor as well as the identified and interpreted characters are stored, to a control logic unit 24, as well as to the sensor 8 and to the LED 6.
  • the control logic unit 24 in turn is connected to a number of peripheral units, which comprise a display 2, which is mounted in the casing, an IR transceiver 26 for transferring information to/from an external computer, buttons 27, by means of which the user can control the apparatus, a tracer LED 28 which emits a light beam which makes it easier for the user to follow the text, and an indicating device 29, e.g. an LED, indicating that the pen is ready to record characters. Control signals to the memories, the sensor, and the peripheral units are generated in the control logic unit 24.
  • the control logic unit also handles generation and prio- ritisation of interruptions to the processor.
  • the buttons 27, the IR transceiver 26, the display 25 and the tracer LED 28, and the LED 6 are accessed by the processor writing and reading in the register in the control logic unit.
  • the buttons 27 generate interruptions to the processor 20 when they are activated.
  • the pen works as follows. A user holds the pen against a sheet of paper with text in the location where he wishes to start recording a character sequence. He pushes a button 27 to activate the pen and passes the latter over the text he wishes to record, following the text in the same way as when one reads a text.
  • the tracer LED 28 emits a light beam which facilitates following the lines.
  • the processor 20 commands the LED 6 to begin generating strobe pulses at a predetermined frequency of 25 Hz, the images recorded by the sensor being stored in the read/write memory 23 at the same frequency.
  • text which is stored in the form of images requires a large amount of memory space and cannot immediately be used by a computer in, for example, a word-processing program.
  • images with overlapping contents are scanned with the aid of the pen described above and are stored in a current image area in the read/write memory 23.
  • the images are stored as images, i.e. with the aid of a plurality of pixels, each having a grey scale value in a range from white to black.
  • step 302 if such an image is available. If there is no previous image, the current image is entered directly into a line image area in the read/write memory.
  • every possible overlap position between the images is examined, at the pixel level, and an overlap measurement is determined as follows: 1) For each overlapping pixel position, the grey scale values of the two pixels included are added up if the latter are not white. A pixel position in which none of the pixels are white is designated a plus position.
  • the composite image gradually develops in the line image area in the read/write memory. It is preferred that the line image area be big enough to store an A4 line of normal typewritten text.
  • step 303 the software of the processor 20 divides the composite image in the line image memory area into sub-images each containing only one character.
  • the purpose of this is to create input signals to a neural network software which is to interpret the characters.
  • the division is effected by adding up the grey scale values of the pixels for each pixel row and each pixel column in the composite image. By studying the local intensity minima for the row sums and column sums obtained, boundaries for the extent of each character in the image can be determined.
  • the composite image contains more than one line of text, which may be the case if the text is small, the lines of text must be separated and the line in question must be selected before the division into sub-images is carried out.
  • the separation can be performed using a technique like the one used for the division into sub- images.
  • each of the sub-images is scaled down to a predetermined pixel format by the sub-image being divided into groups of pixels, each being replaced by a pixel whose grey scale value corresponds to the mean value of the grey scale values of the pixels included in the group. If required, a like downscaling can be carried out between other steps in the method according to the invention. Further, the character is centred with respect to its point of balance and the grey scale values are normalised so that the sum of the square of the grey scale value of each pixel is given a fixed value.
  • each character in the composite image of the character sequence depicted is interpreted.
  • the grey scale values of the pixels which together constitute a sub-image containing only one character are fed as input signals to a neural network.
  • Each output from the neural network represents a character which the network can identify.
  • the output from the network which has the highest output signal is chosen and the character thus chosen is stored in step 306 using a predetermined character code format, for example ASCII code, in the read/write memory 23 in a memory area for interpreted characters.
  • the processor activates the indicating device 29 to inform the user that it is ready to record a new character sequence, step 307. Subsequently, it goes back to step 301.
  • the steps described above are thus carried out by the processor 20 with the aid of the associated units and suitable software.
  • Such software can be created by the skilled person with the aid of the above instructions.
  • the character recognition is performed with the aid of neural network software, which is trained in a suitable manner.
  • Neural network software is commercially available from, for example, MATLAB Neural Network Toolbox, The MathWorks Inc., 24 Prime Park Way, Natick, MA 01760, USA.
  • Figs 4a-4e illustrate how the method according to the invention works when the character sequence "Flygande backasiner" is scanned.
  • Fig. 4a shows the text on a sheet of paper, which also has a certain amount of "dot noise" in the form of small black spots.
  • Fig. 4b shows the images which are being recorded with the aid of the sen- sor. As can be seen from this figure, the contents of the images partially overlap.
  • the letter 1 appears completely in image No. 1 and partially in image No. 2.
  • the degree of overlapping depends on the traction speed, i.e. the speed with which the user pulls the apparatus over the text in relation to the frequency with which the contents of the sensor are read out.
  • Fig. 4c shows what the whole composite image looks like.
  • Fig. 4d illustrates the division of the whole image into sub-images.
  • Fig. 4e shows the scaled and normalised letters which are used as input signals to the neural network.
  • the text "Flygande backasiner" is stored in the read/write memory of the pen as ACSII code.
  • the pen was held straight and was not rotated at all while the character sequence was being recorded. If the pen had been held rotated at a constant angle around its longitudinal axis, the images would instead have looked like the ones in Fig. 5a. In this case, when the images are put together a slanting image is obtained, see Fig. 5b, which has to be rotated in order for the character sequence to be horizontal, Fig. 5c. In order to determine how great a rotation is to be performed, the position of the characters in the composite image is detected in a couple of places. If the pen is rotated around its longitudinal axis at the time of recording, the inclination of the images will be different. An example of this is shown in Fig. 6a.
  • a wave-shaped character sequence is obtained. It can be straightened out to a horizontal line by the position of the characters in the composite image being detected in a plurality of locations and by different segments being rotated to different extents (see Fig. 6c).

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Character Input (AREA)
  • Image Input (AREA)
  • Position Input By Displaying (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Vehicle Body Suspensions (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Sewing Machines And Sewing (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un procédé d'enregistrement d'une séquence sélectionnée de caractères à l'aide d'un crayon contenant un détecteur photosensible (8) doté d'une surface détectrice bidimensionnelle. En passant le crayon sur la séquence de caractères, on enregistre simultanément grâce au détecteur photosensible (8) une pluralité d'images dont les contenus se chevauchent partiellement. Les images enregistrées sont regroupées, horizontalement et verticalement, pour former une image. Ensuite, les caractères de l'image recomposée sont identifiés et mémorisés dans le crayon à l'aide d'un format de code de caractères prédéterminé. Le regroupement, l'identification des caractères et l'enregistrement sont effectués à l'aide d'un processeur de signaux (20-24). Ce procédé et ce crayon permettent de compenser les différentes vitesses de mouvement et les différents angles de rotation du crayon.
PCT/SE1997/001827 1996-11-01 1997-11-03 Procede et dispositif d'enregistrement Ceased WO1998020446A1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
CZ991519A CZ151999A3 (cs) 1996-11-01 1997-11-03 Způsob provádění záznamu a zařízení k provádění tohoto způsobu
EP97911571A EP1010131B1 (fr) 1996-11-01 1997-11-03 Procede et dispositif d'enregistrement
BR9712470-2A BR9712470A (pt) 1996-11-01 1997-11-03 Método e aparelho de registro
IL12966397A IL129663A0 (en) 1996-11-01 1997-11-03 Recording method and apparatus
DE1997627320 DE69727320T2 (de) 1996-11-01 1997-11-03 Aufnahmeverfahren und gerät
JP52128898A JP3641485B2 (ja) 1996-11-01 1997-11-03 記録方法および装置
AU48905/97A AU719267B2 (en) 1996-11-01 1997-11-03 Recording method and apparatus
PL97333022A PL333022A1 (en) 1996-11-01 1997-11-03 Recording method and device
CA002270477A CA2270477C (fr) 1996-11-01 1997-11-03 Procede et dispositif d'enregistrement
AT97911571T ATE258323T1 (de) 1996-11-01 1997-11-03 Aufnahmeverfahren und gerät
BG103367A BG63478B1 (bg) 1996-11-01 1999-04-28 Метод и устройство за запис
US09/301,856 US6529645B2 (en) 1996-11-01 1999-04-29 Recording method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9604008-4 1996-11-01
SE9604008A SE509327C2 (sv) 1996-11-01 1996-11-01 Sätt och anordning för registrering av tecken med hjälp av en penna

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/301,856 Continuation US6529645B2 (en) 1996-11-01 1999-04-29 Recording method and apparatus

Publications (1)

Publication Number Publication Date
WO1998020446A1 true WO1998020446A1 (fr) 1998-05-14

Family

ID=20404465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/001827 Ceased WO1998020446A1 (fr) 1996-11-01 1997-11-03 Procede et dispositif d'enregistrement

Country Status (20)

Country Link
US (1) US6529645B2 (fr)
EP (1) EP1010131B1 (fr)
JP (1) JP3641485B2 (fr)
KR (1) KR20010033610A (fr)
CN (1) CN1160657C (fr)
AT (1) ATE258323T1 (fr)
AU (1) AU719267B2 (fr)
BG (1) BG63478B1 (fr)
BR (1) BR9712470A (fr)
CA (1) CA2270477C (fr)
CZ (1) CZ151999A3 (fr)
DE (1) DE69727320T2 (fr)
ES (1) ES2210502T3 (fr)
ID (1) ID21362A (fr)
IL (1) IL129663A0 (fr)
PL (1) PL333022A1 (fr)
RU (1) RU2198428C2 (fr)
SE (1) SE509327C2 (fr)
WO (1) WO1998020446A1 (fr)
YU (1) YU49124B (fr)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001001263A1 (fr) * 1999-06-28 2001-01-04 C Technologies Ab Enregistrement d'informations
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WO2001093183A1 (fr) 2000-06-02 2001-12-06 C Technologies Ab Procede et dispositif d'enregistrement d'informations
WO2002039372A1 (fr) * 2000-11-13 2002-05-16 C Technologies Ab Procede et dispositif d'enregistrement d'informations
EP1271393A1 (fr) * 2001-06-25 2003-01-02 CSEM Centre Suisse d'Electronique et de Microtechnique SA Photostyle
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Cited By (32)

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Publication number Priority date Publication date Assignee Title
US6270013B1 (en) 1996-07-22 2001-08-07 Wizcom Technologies, Ltd. Hand-holdable optical scanner particularly useful as electronic translator
WO2001001332A1 (fr) * 1999-06-28 2001-01-04 C Technologies Ab Stylet de lecture
WO2001001263A1 (fr) * 1999-06-28 2001-01-04 C Technologies Ab Enregistrement d'informations
US6509893B1 (en) 1999-06-28 2003-01-21 C Technologies Ab Reading pen
US7295193B2 (en) 1999-12-23 2007-11-13 Anoto Ab Written command
US6992655B2 (en) 2000-02-18 2006-01-31 Anoto Ab Input unit arrangement
US7345673B2 (en) 2000-02-18 2008-03-18 Anoto Ab Input unit arrangement
US7054487B2 (en) 2000-02-18 2006-05-30 Anoto Ip Lic Handelsbolag Controlling and electronic device
US8418052B2 (en) 2000-03-21 2013-04-09 Anoto Aktiebolag (Anoto Ab) Processing of documents
US6689966B2 (en) 2000-03-21 2004-02-10 Anoto Ab System and method for determining positional information
US7143952B2 (en) 2000-03-21 2006-12-05 Anoto Ab Apparatus and methods relating to image coding
US7422154B2 (en) 2000-03-21 2008-09-09 Anoto Ab Apparatus and methods relating to image coding
US7050653B2 (en) 2000-04-05 2006-05-23 Anoto Ab Identification of virtual raster pattern
US6586688B2 (en) 2000-04-05 2003-07-01 Anoto Ab Information-related devices and methods
WO2001093183A1 (fr) 2000-06-02 2001-12-06 C Technologies Ab Procede et dispositif d'enregistrement d'informations
JP4815094B2 (ja) * 2000-06-07 2011-11-16 アノト アクティエボラーク メッセージを暗号化するための方法及び装置
US6722574B2 (en) 2000-09-07 2004-04-20 Anoto Ab Business card
US7333947B2 (en) 2000-11-13 2008-02-19 Anoto Ab Network-based system
US7221810B2 (en) 2000-11-13 2007-05-22 Anoto Group Ab Method and device for recording of information
WO2002039372A1 (fr) * 2000-11-13 2002-05-16 C Technologies Ab Procede et dispositif d'enregistrement d'informations
US7239306B2 (en) 2001-05-11 2007-07-03 Anoto Ip Lic Handelsbolag Electronic pen
US7154056B2 (en) 2001-06-25 2006-12-26 Anoto Ab Method and arrangement in a digital communication system
EP1271393A1 (fr) * 2001-06-25 2003-01-02 CSEM Centre Suisse d'Electronique et de Microtechnique SA Photostyle
US7202963B2 (en) 2001-06-28 2007-04-10 Anoto Ab Method for processing information
US7865043B2 (en) 2003-12-16 2011-01-04 Anoto Ab Method, apparatus, computer program and storage medium for recording a movement of a user unit
US10299110B2 (en) 2012-08-23 2019-05-21 Samsung Electronics Co., Ltd. Information transmission method and system, device, and computer readable recording medium thereof
BE1023380B1 (fr) * 2015-08-31 2017-03-01 I.R.I.S. S.A. Procédé de traitement d'informations provenant d'un dispositif de numérisation à main
BE1023388B1 (fr) * 2015-08-31 2017-03-01 I.R.I.S. S.A. Procédé et système pour corriger une image provenant d'un dispositif de numérisation à main
WO2017037136A1 (fr) * 2015-08-31 2017-03-09 I.R.I.S. Procédé et système pour la correction d'une image provenant d'un dispositif de balayage portatif
WO2017037138A1 (fr) * 2015-08-31 2017-03-09 I.R.I.S. Procédé de traitement d'informations provenant d'un dispositif de balayage tenu à la main
US9679179B2 (en) 2015-08-31 2017-06-13 I.R.I.S. Method for processing information from a hand-held scanning device
US9692929B2 (en) 2015-08-31 2017-06-27 I.R.I.S. Method and system for correction of an image from a hand-held scanning device

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AU4890597A (en) 1998-05-29
PL333022A1 (en) 1999-11-08
ES2210502T3 (es) 2004-07-01
EP1010131B1 (fr) 2004-01-21
DE69727320T2 (de) 2004-11-18
AU719267B2 (en) 2000-05-04
CA2270477A1 (fr) 1998-05-14
SE9604008D0 (sv) 1996-11-01
DE69727320D1 (de) 2004-02-26
SE509327C2 (sv) 1999-01-11
CN1239563A (zh) 1999-12-22
CZ151999A3 (cs) 1999-08-11
BR9712470A (pt) 1999-12-21
CN1160657C (zh) 2004-08-04
JP2001508204A (ja) 2001-06-19
IL129663A0 (en) 2000-02-29
EP1010131A1 (fr) 2000-06-21
BG103367A (en) 2000-02-29
CA2270477C (fr) 2007-07-31
US6529645B2 (en) 2003-03-04
ATE258323T1 (de) 2004-02-15
JP3641485B2 (ja) 2005-04-20
YU20699A (sh) 2000-03-21
BG63478B1 (bg) 2002-02-28
RU2198428C2 (ru) 2003-02-10
SE9604008L (sv) 1998-05-02
ID21362A (id) 1999-05-27
US20020001418A1 (en) 2002-01-03
YU49124B (sh) 2004-03-12
KR20010033610A (ko) 2001-04-25

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